My nidoran evolved at level 16
The Pokemon Nidoran Either Male Or Female Evolves Most Commonly At The Level Of 18 But If You Did Not Give It Happiness Or Niceness It Will Hold Back Till level 22. As Always I Gave Mine The Soothe Bell And It Was Evolved At level 18. So There you Go.
I haven't evolved it yet but I hear it evolves at lvl. 18 if it's had happiness and caring.
I say level 18,but it depends how you raise it.Mine evolved at level 22.
It evolves at level 16
16 if you treat it right
Mine was level 25 so there you go
It evoles at lvl 18 commonly but I once had one that didnt evolve at level 22 so I think it depends on how you raised it
It evolves at level 18